William c



(No Model.)

W. G. DILLMAN.

ANNUNGIATOR. No. 472,439.

Patented Apr. 5, 1892.

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U ITED STATES \VILLIAM O. DILLMAN, OF BROOKLYN, ASSIGNOR TO OWEN WALSH, OF NElV YORK, N. Y.

ANNUNCIATOR.

SPECIFICATION forming part of Letters Patent No. 472,439, dated April 5, 1892.

Application filed December 22, 1891. Serial No. 415,863. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM C. DILLMAN,

of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Annunciator, of which the following is a full, clear, and exact description.

My invention relates to improvements in that class of annunciators which are used in ter described which may be easily operated by the breath of a person blowing into the tube and which will operate in such a way that the circuit through the electric bell will be closed momentarily only, and will thus prevent quick exhaustion of the battery.

To this end my invention consists in an annunciator the construction of which will be hereinafter described and claimed. Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in both the views.

Figure 1 is a broken vertical longitudinal section of the annunciator embodying my invention, showing also the electrical connections; and Fig. 2 is a cross-section on the line 2 2 in Fig. 1.

The speaking-tube is of the usual kind and is supported at one end in the usual wallboard 11 and is closed at its mouth bya common form of swinging lid 12,whichlid is hinged to a face-plate 13, secured to the wall-board 11, having a flange 13 to enter the mouth of the speaking-tube. The lid 12 has a bent arm 12 on its back, which carries a latch 12 at its lower end, and the latch swings upward when the lid swings downward and engages a cross piece 12, which thus prevents the lid from dropping too far. This construction is shown in the United States Patent No. 458,947, dated September 1, 1891, and forms no part of this invention.

A hollow chamber 14 of an essentially triangular shape is produced on the top of the speaking-tube near the mouth of the latter, and secured to an insulating-block 15 on the top of the chamberis a-contact-strip 15,which forms one terminal of the electric circuit and which is bent downward so as to extend to a point a little above the tube. This contact 15 is adapted to be struck by a swinging contact-arm 16, which is arranged horizontally beneath it, the said arm 16 being pivoted on a suitable support 17 and having its free end weighted, as shown at 18, so that it will normally drop away from thestrip 15. The contact-arm 16 is held to swingin a slot 19 in the vertical portion of the wall of the chamber, and the arm is provided beneath its pivot with a depending stud20,which servesasanabutment for the fan 2l,which fan is pivoted on the support 17 and hangs down into the speakingtube 10. It will thus be seen that the fan 21 may be swung freely backward in the tube and up into the chamber 14:, as shown by dotted lines in Fig. 1; but if swung in the opposite direction it will contact with the stud and raise the arm 16, so that the latter will contact with the strip 15 and close the electric circuit, as hereinafter described.

An electric bell 22 is arranged adjacent to the mouth of the tube in the usual way, and the connections between the bell and the operative parts of the ann unciator are as follows: A battery A, located in any convenient place, connects by a wire a with one of the bindingposts of the bell and also by a wire a with the contact-arm 16. The contact-strip 15 is also connected with one binding-post of the bell by a wire a. It will thus be seen that when the two contacts 15 and 16 touch the circuit will be from the battery through the wire a, the bell 22, the wire a, the contacts 15 and 16, and the wire a to the battery.

The speaking-tube and annunciator are especially adapted for use in connection with the common form of removablyflexible mouthtube, as shown by dotted lines in Fig. 1, and the operation of the device is as follows: hen a person wishes to use the tube and desires to attract attention, he blows into the tube and the current of air strikes the fan 21, raises the contact arm 16, so that it touches the contact-strip 15, and the circuit through the bell is thus closed and the bell rung; but as soon as the air ceases to act on the fan the contact-arm 16 will drop, thus breaking the circuit and preventing the disagreeablelongcontinued ringing of the bell and also saving; the battery. \Vhen a person called comes to the tube, the usual flexible mouth-tube thrust into the tube, as shown by dotted lines 111 Fig. 1, and this tube, striking the fan 21, pushes it backward and upward in the main tube, thus throwing it out of the main passage, so that it will not in any way interfere with conversation.

I am aware that it is not new to close the circuit through an electric hell by means of air-operated mechanism carried by the tube, and I do not claim this feature, broadly, as my invention.

Having thus fully described my invention, 1 claim as new and desire to secure by Letters Patent 1. The combination, with a speaking-tube, of a contact supported above the tube and forming one terminal of an electric-bell circuit, a swinging contact forming the other terminal of the bellcircuit and arrai'iged be heath the upper contact and adapted to strike the same, and a fan connected with the swinging contact and extending into the bore of the tube, substantially as described.

2. The combinetion,with the speaking-tube, of an upper contact fixed above the tube and forming one terminal of an electric-bell circult, a contaeharm forming the other terminal of the circuit and held to swing against the upper contact, and a fan held to swingin the bore of the tube, said fan being adapted to swing freely in one direction and to raise the contact-arm when swung in the opposite direction, substantially as described.

The combination,with the speaking-tube, of a swinging contact-arm supported above the tube and forming one terminal 01": an elec tric-bell circuit, a depending stud produced on the arm near its pivoted end, a swinging, fan mounted in the tube and arranged to swing against the stud, and a contact mounted in the path of the swinging contact and forming the other terminal of the bell-cireuit, substantially as described.

4-. The cmnbination,wi th the speaki ng-tube, of a chamber produced on the upper part of the tube, a swinging coutactarm mounted in the chamber and held to swing in a slot of the chamber-Wall, a fan pivoted in the chanr her and extending into the bore of the tube, said fan being adapted to operate the swinging contact-arm, and a contact forming the other terminal of the belLcircuit, said contact being mounted in the chamber and extending into the path of the swinging contact, substantially as described.

\VILLIAM C. DILLMAN.

Wi tncsscs:

WARREN 13. IIU'rcnINsoN, (J. SEDGWICK. 

